1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * libahci.c - Common AHCI SATA low-level routines
4 *
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
7 * on emails.
8 *
9 * Copyright 2004-2005 Red Hat, Inc.
10 *
11 * libata documentation is available via 'make {ps|pdf}docs',
12 * as Documentation/driver-api/libata.rst
13 *
14 * AHCI hardware documentation:
15 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
16 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/gfp.h>
21 #include <linux/module.h>
22 #include <linux/nospec.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <linux/libata.h>
31 #include <linux/pci.h>
32 #include "ahci.h"
33 #include "libata.h"
34
35 static int ahci_skip_host_reset;
36 int ahci_ignore_sss;
37 EXPORT_SYMBOL_GPL(ahci_ignore_sss);
38
39 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
40 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
41
42 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
43 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
44
45 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
46 unsigned hints);
47 static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
48 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
49 size_t size);
50 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
51 ssize_t size);
52
53
54
55 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
56 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
57 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
58 static int ahci_port_start(struct ata_port *ap);
59 static void ahci_port_stop(struct ata_port *ap);
60 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc);
61 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
62 static void ahci_freeze(struct ata_port *ap);
63 static void ahci_thaw(struct ata_port *ap);
64 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
65 static void ahci_enable_fbs(struct ata_port *ap);
66 static void ahci_disable_fbs(struct ata_port *ap);
67 static void ahci_pmp_attach(struct ata_port *ap);
68 static void ahci_pmp_detach(struct ata_port *ap);
69 static int ahci_softreset(struct ata_link *link, unsigned int *class,
70 unsigned long deadline);
71 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
72 unsigned long deadline);
73 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
74 unsigned long deadline);
75 static void ahci_postreset(struct ata_link *link, unsigned int *class);
76 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
77 static void ahci_dev_config(struct ata_device *dev);
78 #ifdef CONFIG_PM
79 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
80 #endif
81 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
82 static ssize_t ahci_activity_store(struct ata_device *dev,
83 enum sw_activity val);
84 static void ahci_init_sw_activity(struct ata_link *link);
85
86 static ssize_t ahci_show_host_caps(struct device *dev,
87 struct device_attribute *attr, char *buf);
88 static ssize_t ahci_show_host_cap2(struct device *dev,
89 struct device_attribute *attr, char *buf);
90 static ssize_t ahci_show_host_version(struct device *dev,
91 struct device_attribute *attr, char *buf);
92 static ssize_t ahci_show_port_cmd(struct device *dev,
93 struct device_attribute *attr, char *buf);
94 static ssize_t ahci_read_em_buffer(struct device *dev,
95 struct device_attribute *attr, char *buf);
96 static ssize_t ahci_store_em_buffer(struct device *dev,
97 struct device_attribute *attr,
98 const char *buf, size_t size);
99 static ssize_t ahci_show_em_supported(struct device *dev,
100 struct device_attribute *attr, char *buf);
101 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance);
102
103 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
104 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
105 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
106 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
107 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
108 ahci_read_em_buffer, ahci_store_em_buffer);
109 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
110
111 struct device_attribute *ahci_shost_attrs[] = {
112 &dev_attr_link_power_management_policy,
113 &dev_attr_em_message_type,
114 &dev_attr_em_message,
115 &dev_attr_ahci_host_caps,
116 &dev_attr_ahci_host_cap2,
117 &dev_attr_ahci_host_version,
118 &dev_attr_ahci_port_cmd,
119 &dev_attr_em_buffer,
120 &dev_attr_em_message_supported,
121 NULL
122 };
123 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
124
125 struct device_attribute *ahci_sdev_attrs[] = {
126 &dev_attr_sw_activity,
127 &dev_attr_unload_heads,
128 &dev_attr_ncq_prio_enable,
129 NULL
130 };
131 EXPORT_SYMBOL_GPL(ahci_sdev_attrs);
132
133 struct ata_port_operations ahci_ops = {
134 .inherits = &sata_pmp_port_ops,
135
136 .qc_defer = ahci_pmp_qc_defer,
137 .qc_prep = ahci_qc_prep,
138 .qc_issue = ahci_qc_issue,
139 .qc_fill_rtf = ahci_qc_fill_rtf,
140
141 .freeze = ahci_freeze,
142 .thaw = ahci_thaw,
143 .softreset = ahci_softreset,
144 .hardreset = ahci_hardreset,
145 .postreset = ahci_postreset,
146 .pmp_softreset = ahci_softreset,
147 .error_handler = ahci_error_handler,
148 .post_internal_cmd = ahci_post_internal_cmd,
149 .dev_config = ahci_dev_config,
150
151 .scr_read = ahci_scr_read,
152 .scr_write = ahci_scr_write,
153 .pmp_attach = ahci_pmp_attach,
154 .pmp_detach = ahci_pmp_detach,
155
156 .set_lpm = ahci_set_lpm,
157 .em_show = ahci_led_show,
158 .em_store = ahci_led_store,
159 .sw_activity_show = ahci_activity_show,
160 .sw_activity_store = ahci_activity_store,
161 .transmit_led_message = ahci_transmit_led_message,
162 #ifdef CONFIG_PM
163 .port_suspend = ahci_port_suspend,
164 .port_resume = ahci_port_resume,
165 #endif
166 .port_start = ahci_port_start,
167 .port_stop = ahci_port_stop,
168 };
169 EXPORT_SYMBOL_GPL(ahci_ops);
170
171 struct ata_port_operations ahci_pmp_retry_srst_ops = {
172 .inherits = &ahci_ops,
173 .softreset = ahci_pmp_retry_softreset,
174 };
175 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);
176
177 static bool ahci_em_messages __read_mostly = true;
178 module_param(ahci_em_messages, bool, 0444);
179 /* add other LED protocol types when they become supported */
180 MODULE_PARM_DESC(ahci_em_messages,
181 "AHCI Enclosure Management Message control (0 = off, 1 = on)");
182
183 /* device sleep idle timeout in ms */
184 static int devslp_idle_timeout __read_mostly = 1000;
185 module_param(devslp_idle_timeout, int, 0644);
186 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
187
ahci_enable_ahci(void __iomem * mmio)188 static void ahci_enable_ahci(void __iomem *mmio)
189 {
190 int i;
191 u32 tmp;
192
193 /* turn on AHCI_EN */
194 tmp = readl(mmio + HOST_CTL);
195 if (tmp & HOST_AHCI_EN)
196 return;
197
198 /* Some controllers need AHCI_EN to be written multiple times.
199 * Try a few times before giving up.
200 */
201 for (i = 0; i < 5; i++) {
202 tmp |= HOST_AHCI_EN;
203 writel(tmp, mmio + HOST_CTL);
204 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
205 if (tmp & HOST_AHCI_EN)
206 return;
207 msleep(10);
208 }
209
210 WARN_ON(1);
211 }
212
213 /**
214 * ahci_rpm_get_port - Make sure the port is powered on
215 * @ap: Port to power on
216 *
217 * Whenever there is need to access the AHCI host registers outside of
218 * normal execution paths, call this function to make sure the host is
219 * actually powered on.
220 */
ahci_rpm_get_port(struct ata_port * ap)221 static int ahci_rpm_get_port(struct ata_port *ap)
222 {
223 return pm_runtime_get_sync(ap->dev);
224 }
225
226 /**
227 * ahci_rpm_put_port - Undoes ahci_rpm_get_port()
228 * @ap: Port to power down
229 *
230 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
231 * if it has no more active users.
232 */
ahci_rpm_put_port(struct ata_port * ap)233 static void ahci_rpm_put_port(struct ata_port *ap)
234 {
235 pm_runtime_put(ap->dev);
236 }
237
ahci_show_host_caps(struct device * dev,struct device_attribute * attr,char * buf)238 static ssize_t ahci_show_host_caps(struct device *dev,
239 struct device_attribute *attr, char *buf)
240 {
241 struct Scsi_Host *shost = class_to_shost(dev);
242 struct ata_port *ap = ata_shost_to_port(shost);
243 struct ahci_host_priv *hpriv = ap->host->private_data;
244
245 return sprintf(buf, "%x\n", hpriv->cap);
246 }
247
ahci_show_host_cap2(struct device * dev,struct device_attribute * attr,char * buf)248 static ssize_t ahci_show_host_cap2(struct device *dev,
249 struct device_attribute *attr, char *buf)
250 {
251 struct Scsi_Host *shost = class_to_shost(dev);
252 struct ata_port *ap = ata_shost_to_port(shost);
253 struct ahci_host_priv *hpriv = ap->host->private_data;
254
255 return sprintf(buf, "%x\n", hpriv->cap2);
256 }
257
ahci_show_host_version(struct device * dev,struct device_attribute * attr,char * buf)258 static ssize_t ahci_show_host_version(struct device *dev,
259 struct device_attribute *attr, char *buf)
260 {
261 struct Scsi_Host *shost = class_to_shost(dev);
262 struct ata_port *ap = ata_shost_to_port(shost);
263 struct ahci_host_priv *hpriv = ap->host->private_data;
264
265 return sprintf(buf, "%x\n", hpriv->version);
266 }
267
ahci_show_port_cmd(struct device * dev,struct device_attribute * attr,char * buf)268 static ssize_t ahci_show_port_cmd(struct device *dev,
269 struct device_attribute *attr, char *buf)
270 {
271 struct Scsi_Host *shost = class_to_shost(dev);
272 struct ata_port *ap = ata_shost_to_port(shost);
273 void __iomem *port_mmio = ahci_port_base(ap);
274 ssize_t ret;
275
276 ahci_rpm_get_port(ap);
277 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
278 ahci_rpm_put_port(ap);
279
280 return ret;
281 }
282
ahci_read_em_buffer(struct device * dev,struct device_attribute * attr,char * buf)283 static ssize_t ahci_read_em_buffer(struct device *dev,
284 struct device_attribute *attr, char *buf)
285 {
286 struct Scsi_Host *shost = class_to_shost(dev);
287 struct ata_port *ap = ata_shost_to_port(shost);
288 struct ahci_host_priv *hpriv = ap->host->private_data;
289 void __iomem *mmio = hpriv->mmio;
290 void __iomem *em_mmio = mmio + hpriv->em_loc;
291 u32 em_ctl, msg;
292 unsigned long flags;
293 size_t count;
294 int i;
295
296 ahci_rpm_get_port(ap);
297 spin_lock_irqsave(ap->lock, flags);
298
299 em_ctl = readl(mmio + HOST_EM_CTL);
300 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
301 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
302 spin_unlock_irqrestore(ap->lock, flags);
303 ahci_rpm_put_port(ap);
304 return -EINVAL;
305 }
306
307 if (!(em_ctl & EM_CTL_MR)) {
308 spin_unlock_irqrestore(ap->lock, flags);
309 ahci_rpm_put_port(ap);
310 return -EAGAIN;
311 }
312
313 if (!(em_ctl & EM_CTL_SMB))
314 em_mmio += hpriv->em_buf_sz;
315
316 count = hpriv->em_buf_sz;
317
318 /* the count should not be larger than PAGE_SIZE */
319 if (count > PAGE_SIZE) {
320 if (printk_ratelimit())
321 ata_port_warn(ap,
322 "EM read buffer size too large: "
323 "buffer size %u, page size %lu\n",
324 hpriv->em_buf_sz, PAGE_SIZE);
325 count = PAGE_SIZE;
326 }
327
328 for (i = 0; i < count; i += 4) {
329 msg = readl(em_mmio + i);
330 buf[i] = msg & 0xff;
331 buf[i + 1] = (msg >> 8) & 0xff;
332 buf[i + 2] = (msg >> 16) & 0xff;
333 buf[i + 3] = (msg >> 24) & 0xff;
334 }
335
336 spin_unlock_irqrestore(ap->lock, flags);
337 ahci_rpm_put_port(ap);
338
339 return i;
340 }
341
ahci_store_em_buffer(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)342 static ssize_t ahci_store_em_buffer(struct device *dev,
343 struct device_attribute *attr,
344 const char *buf, size_t size)
345 {
346 struct Scsi_Host *shost = class_to_shost(dev);
347 struct ata_port *ap = ata_shost_to_port(shost);
348 struct ahci_host_priv *hpriv = ap->host->private_data;
349 void __iomem *mmio = hpriv->mmio;
350 void __iomem *em_mmio = mmio + hpriv->em_loc;
351 const unsigned char *msg_buf = buf;
352 u32 em_ctl, msg;
353 unsigned long flags;
354 int i;
355
356 /* check size validity */
357 if (!(ap->flags & ATA_FLAG_EM) ||
358 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
359 size % 4 || size > hpriv->em_buf_sz)
360 return -EINVAL;
361
362 ahci_rpm_get_port(ap);
363 spin_lock_irqsave(ap->lock, flags);
364
365 em_ctl = readl(mmio + HOST_EM_CTL);
366 if (em_ctl & EM_CTL_TM) {
367 spin_unlock_irqrestore(ap->lock, flags);
368 ahci_rpm_put_port(ap);
369 return -EBUSY;
370 }
371
372 for (i = 0; i < size; i += 4) {
373 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
374 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
375 writel(msg, em_mmio + i);
376 }
377
378 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
379
380 spin_unlock_irqrestore(ap->lock, flags);
381 ahci_rpm_put_port(ap);
382
383 return size;
384 }
385
ahci_show_em_supported(struct device * dev,struct device_attribute * attr,char * buf)386 static ssize_t ahci_show_em_supported(struct device *dev,
387 struct device_attribute *attr, char *buf)
388 {
389 struct Scsi_Host *shost = class_to_shost(dev);
390 struct ata_port *ap = ata_shost_to_port(shost);
391 struct ahci_host_priv *hpriv = ap->host->private_data;
392 void __iomem *mmio = hpriv->mmio;
393 u32 em_ctl;
394
395 ahci_rpm_get_port(ap);
396 em_ctl = readl(mmio + HOST_EM_CTL);
397 ahci_rpm_put_port(ap);
398
399 return sprintf(buf, "%s%s%s%s\n",
400 em_ctl & EM_CTL_LED ? "led " : "",
401 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
402 em_ctl & EM_CTL_SES ? "ses-2 " : "",
403 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
404 }
405
406 /**
407 * ahci_save_initial_config - Save and fixup initial config values
408 * @dev: target AHCI device
409 * @hpriv: host private area to store config values
410 *
411 * Some registers containing configuration info might be setup by
412 * BIOS and might be cleared on reset. This function saves the
413 * initial values of those registers into @hpriv such that they
414 * can be restored after controller reset.
415 *
416 * If inconsistent, config values are fixed up by this function.
417 *
418 * If it is not set already this function sets hpriv->start_engine to
419 * ahci_start_engine.
420 *
421 * LOCKING:
422 * None.
423 */
ahci_save_initial_config(struct device * dev,struct ahci_host_priv * hpriv)424 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
425 {
426 void __iomem *mmio = hpriv->mmio;
427 u32 cap, cap2, vers, port_map;
428 int i;
429
430 /* make sure AHCI mode is enabled before accessing CAP */
431 ahci_enable_ahci(mmio);
432
433 /* Values prefixed with saved_ are written back to host after
434 * reset. Values without are used for driver operation.
435 */
436 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
437 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
438
439 /* CAP2 register is only defined for AHCI 1.2 and later */
440 vers = readl(mmio + HOST_VERSION);
441 if ((vers >> 16) > 1 ||
442 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
443 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
444 else
445 hpriv->saved_cap2 = cap2 = 0;
446
447 /* some chips have errata preventing 64bit use */
448 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
449 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
450 cap &= ~HOST_CAP_64;
451 }
452
453 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
454 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
455 cap &= ~HOST_CAP_NCQ;
456 }
457
458 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
459 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
460 cap |= HOST_CAP_NCQ;
461 }
462
463 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
464 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
465 cap &= ~HOST_CAP_PMP;
466 }
467
468 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
469 dev_info(dev,
470 "controller can't do SNTF, turning off CAP_SNTF\n");
471 cap &= ~HOST_CAP_SNTF;
472 }
473
474 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) {
475 dev_info(dev,
476 "controller can't do DEVSLP, turning off\n");
477 cap2 &= ~HOST_CAP2_SDS;
478 cap2 &= ~HOST_CAP2_SADM;
479 }
480
481 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
482 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
483 cap |= HOST_CAP_FBS;
484 }
485
486 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
487 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
488 cap &= ~HOST_CAP_FBS;
489 }
490
491 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) {
492 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n");
493 cap |= HOST_CAP_ALPM;
494 }
495
496 if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) {
497 dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n");
498 cap &= ~HOST_CAP_SXS;
499 }
500
501 if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
502 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
503 port_map, hpriv->force_port_map);
504 port_map = hpriv->force_port_map;
505 hpriv->saved_port_map = port_map;
506 }
507
508 if (hpriv->mask_port_map) {
509 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
510 port_map,
511 port_map & hpriv->mask_port_map);
512 port_map &= hpriv->mask_port_map;
513 }
514
515 /* cross check port_map and cap.n_ports */
516 if (port_map) {
517 int map_ports = 0;
518
519 for (i = 0; i < AHCI_MAX_PORTS; i++)
520 if (port_map & (1 << i))
521 map_ports++;
522
523 /* If PI has more ports than n_ports, whine, clear
524 * port_map and let it be generated from n_ports.
525 */
526 if (map_ports > ahci_nr_ports(cap)) {
527 dev_warn(dev,
528 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
529 port_map, ahci_nr_ports(cap));
530 port_map = 0;
531 }
532 }
533
534 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
535 if (!port_map && vers < 0x10300) {
536 port_map = (1 << ahci_nr_ports(cap)) - 1;
537 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
538
539 /* write the fixed up value to the PI register */
540 hpriv->saved_port_map = port_map;
541 }
542
543 /* record values to use during operation */
544 hpriv->cap = cap;
545 hpriv->cap2 = cap2;
546 hpriv->version = readl(mmio + HOST_VERSION);
547 hpriv->port_map = port_map;
548
549 if (!hpriv->start_engine)
550 hpriv->start_engine = ahci_start_engine;
551
552 if (!hpriv->stop_engine)
553 hpriv->stop_engine = ahci_stop_engine;
554
555 if (!hpriv->irq_handler)
556 hpriv->irq_handler = ahci_single_level_irq_intr;
557 }
558 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
559
560 /**
561 * ahci_restore_initial_config - Restore initial config
562 * @host: target ATA host
563 *
564 * Restore initial config stored by ahci_save_initial_config().
565 *
566 * LOCKING:
567 * None.
568 */
ahci_restore_initial_config(struct ata_host * host)569 static void ahci_restore_initial_config(struct ata_host *host)
570 {
571 struct ahci_host_priv *hpriv = host->private_data;
572 void __iomem *mmio = hpriv->mmio;
573
574 writel(hpriv->saved_cap, mmio + HOST_CAP);
575 if (hpriv->saved_cap2)
576 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
577 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
578 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
579 }
580
ahci_scr_offset(struct ata_port * ap,unsigned int sc_reg)581 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
582 {
583 static const int offset[] = {
584 [SCR_STATUS] = PORT_SCR_STAT,
585 [SCR_CONTROL] = PORT_SCR_CTL,
586 [SCR_ERROR] = PORT_SCR_ERR,
587 [SCR_ACTIVE] = PORT_SCR_ACT,
588 [SCR_NOTIFICATION] = PORT_SCR_NTF,
589 };
590 struct ahci_host_priv *hpriv = ap->host->private_data;
591
592 if (sc_reg < ARRAY_SIZE(offset) &&
593 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
594 return offset[sc_reg];
595 return 0;
596 }
597
ahci_scr_read(struct ata_link * link,unsigned int sc_reg,u32 * val)598 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
599 {
600 void __iomem *port_mmio = ahci_port_base(link->ap);
601 int offset = ahci_scr_offset(link->ap, sc_reg);
602
603 if (offset) {
604 *val = readl(port_mmio + offset);
605 return 0;
606 }
607 return -EINVAL;
608 }
609
ahci_scr_write(struct ata_link * link,unsigned int sc_reg,u32 val)610 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
611 {
612 void __iomem *port_mmio = ahci_port_base(link->ap);
613 int offset = ahci_scr_offset(link->ap, sc_reg);
614
615 if (offset) {
616 writel(val, port_mmio + offset);
617 return 0;
618 }
619 return -EINVAL;
620 }
621
ahci_start_engine(struct ata_port * ap)622 void ahci_start_engine(struct ata_port *ap)
623 {
624 void __iomem *port_mmio = ahci_port_base(ap);
625 u32 tmp;
626
627 /* start DMA */
628 tmp = readl(port_mmio + PORT_CMD);
629 tmp |= PORT_CMD_START;
630 writel(tmp, port_mmio + PORT_CMD);
631 readl(port_mmio + PORT_CMD); /* flush */
632 }
633 EXPORT_SYMBOL_GPL(ahci_start_engine);
634
ahci_stop_engine(struct ata_port * ap)635 int ahci_stop_engine(struct ata_port *ap)
636 {
637 void __iomem *port_mmio = ahci_port_base(ap);
638 struct ahci_host_priv *hpriv = ap->host->private_data;
639 u32 tmp;
640
641 /*
642 * On some controllers, stopping a port's DMA engine while the port
643 * is in ALPM state (partial or slumber) results in failures on
644 * subsequent DMA engine starts. For those controllers, put the
645 * port back in active state before stopping its DMA engine.
646 */
647 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) &&
648 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) &&
649 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) {
650 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n");
651 return -EIO;
652 }
653
654 tmp = readl(port_mmio + PORT_CMD);
655
656 /* check if the HBA is idle */
657 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
658 return 0;
659
660 /*
661 * Don't try to issue commands but return with ENODEV if the
662 * AHCI controller not available anymore (e.g. due to PCIe hot
663 * unplugging). Otherwise a 500ms delay for each port is added.
664 */
665 if (tmp == 0xffffffff) {
666 dev_err(ap->host->dev, "AHCI controller unavailable!\n");
667 return -ENODEV;
668 }
669
670 /* setting HBA to idle */
671 tmp &= ~PORT_CMD_START;
672 writel(tmp, port_mmio + PORT_CMD);
673
674 /* wait for engine to stop. This could be as long as 500 msec */
675 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
676 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
677 if (tmp & PORT_CMD_LIST_ON)
678 return -EIO;
679
680 return 0;
681 }
682 EXPORT_SYMBOL_GPL(ahci_stop_engine);
683
ahci_start_fis_rx(struct ata_port * ap)684 void ahci_start_fis_rx(struct ata_port *ap)
685 {
686 void __iomem *port_mmio = ahci_port_base(ap);
687 struct ahci_host_priv *hpriv = ap->host->private_data;
688 struct ahci_port_priv *pp = ap->private_data;
689 u32 tmp;
690
691 /* set FIS registers */
692 if (hpriv->cap & HOST_CAP_64)
693 writel((pp->cmd_slot_dma >> 16) >> 16,
694 port_mmio + PORT_LST_ADDR_HI);
695 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
696
697 if (hpriv->cap & HOST_CAP_64)
698 writel((pp->rx_fis_dma >> 16) >> 16,
699 port_mmio + PORT_FIS_ADDR_HI);
700 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
701
702 /* enable FIS reception */
703 tmp = readl(port_mmio + PORT_CMD);
704 tmp |= PORT_CMD_FIS_RX;
705 writel(tmp, port_mmio + PORT_CMD);
706
707 /* flush */
708 readl(port_mmio + PORT_CMD);
709 }
710 EXPORT_SYMBOL_GPL(ahci_start_fis_rx);
711
ahci_stop_fis_rx(struct ata_port * ap)712 static int ahci_stop_fis_rx(struct ata_port *ap)
713 {
714 void __iomem *port_mmio = ahci_port_base(ap);
715 u32 tmp;
716
717 /* disable FIS reception */
718 tmp = readl(port_mmio + PORT_CMD);
719 tmp &= ~PORT_CMD_FIS_RX;
720 writel(tmp, port_mmio + PORT_CMD);
721
722 /* wait for completion, spec says 500ms, give it 1000 */
723 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
724 PORT_CMD_FIS_ON, 10, 1000);
725 if (tmp & PORT_CMD_FIS_ON)
726 return -EBUSY;
727
728 return 0;
729 }
730
ahci_power_up(struct ata_port * ap)731 static void ahci_power_up(struct ata_port *ap)
732 {
733 struct ahci_host_priv *hpriv = ap->host->private_data;
734 void __iomem *port_mmio = ahci_port_base(ap);
735 u32 cmd;
736
737 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
738
739 /* spin up device */
740 if (hpriv->cap & HOST_CAP_SSS) {
741 cmd |= PORT_CMD_SPIN_UP;
742 writel(cmd, port_mmio + PORT_CMD);
743 }
744
745 /* wake up link */
746 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
747 }
748
ahci_set_lpm(struct ata_link * link,enum ata_lpm_policy policy,unsigned int hints)749 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
750 unsigned int hints)
751 {
752 struct ata_port *ap = link->ap;
753 struct ahci_host_priv *hpriv = ap->host->private_data;
754 struct ahci_port_priv *pp = ap->private_data;
755 void __iomem *port_mmio = ahci_port_base(ap);
756
757 if (policy != ATA_LPM_MAX_POWER) {
758 /* wakeup flag only applies to the max power policy */
759 hints &= ~ATA_LPM_WAKE_ONLY;
760
761 /*
762 * Disable interrupts on Phy Ready. This keeps us from
763 * getting woken up due to spurious phy ready
764 * interrupts.
765 */
766 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
767 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
768
769 sata_link_scr_lpm(link, policy, false);
770 }
771
772 if (hpriv->cap & HOST_CAP_ALPM) {
773 u32 cmd = readl(port_mmio + PORT_CMD);
774
775 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
776 if (!(hints & ATA_LPM_WAKE_ONLY))
777 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
778 cmd |= PORT_CMD_ICC_ACTIVE;
779
780 writel(cmd, port_mmio + PORT_CMD);
781 readl(port_mmio + PORT_CMD);
782
783 /* wait 10ms to be sure we've come out of LPM state */
784 ata_msleep(ap, 10);
785
786 if (hints & ATA_LPM_WAKE_ONLY)
787 return 0;
788 } else {
789 cmd |= PORT_CMD_ALPE;
790 if (policy == ATA_LPM_MIN_POWER)
791 cmd |= PORT_CMD_ASP;
792 else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
793 cmd &= ~PORT_CMD_ASP;
794
795 /* write out new cmd value */
796 writel(cmd, port_mmio + PORT_CMD);
797 }
798 }
799
800 /* set aggressive device sleep */
801 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
802 (hpriv->cap2 & HOST_CAP2_SADM) &&
803 (link->device->flags & ATA_DFLAG_DEVSLP)) {
804 if (policy == ATA_LPM_MIN_POWER ||
805 policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
806 ahci_set_aggressive_devslp(ap, true);
807 else
808 ahci_set_aggressive_devslp(ap, false);
809 }
810
811 if (policy == ATA_LPM_MAX_POWER) {
812 sata_link_scr_lpm(link, policy, false);
813
814 /* turn PHYRDY IRQ back on */
815 pp->intr_mask |= PORT_IRQ_PHYRDY;
816 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
817 }
818
819 return 0;
820 }
821
822 #ifdef CONFIG_PM
ahci_power_down(struct ata_port * ap)823 static void ahci_power_down(struct ata_port *ap)
824 {
825 struct ahci_host_priv *hpriv = ap->host->private_data;
826 void __iomem *port_mmio = ahci_port_base(ap);
827 u32 cmd, scontrol;
828
829 if (!(hpriv->cap & HOST_CAP_SSS))
830 return;
831
832 /* put device into listen mode, first set PxSCTL.DET to 0 */
833 scontrol = readl(port_mmio + PORT_SCR_CTL);
834 scontrol &= ~0xf;
835 writel(scontrol, port_mmio + PORT_SCR_CTL);
836
837 /* then set PxCMD.SUD to 0 */
838 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
839 cmd &= ~PORT_CMD_SPIN_UP;
840 writel(cmd, port_mmio + PORT_CMD);
841 }
842 #endif
843
ahci_start_port(struct ata_port * ap)844 static void ahci_start_port(struct ata_port *ap)
845 {
846 struct ahci_host_priv *hpriv = ap->host->private_data;
847 struct ahci_port_priv *pp = ap->private_data;
848 struct ata_link *link;
849 struct ahci_em_priv *emp;
850 ssize_t rc;
851 int i;
852
853 /* enable FIS reception */
854 ahci_start_fis_rx(ap);
855
856 /* enable DMA */
857 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
858 hpriv->start_engine(ap);
859
860 /* turn on LEDs */
861 if (ap->flags & ATA_FLAG_EM) {
862 ata_for_each_link(link, ap, EDGE) {
863 emp = &pp->em_priv[link->pmp];
864
865 /* EM Transmit bit maybe busy during init */
866 for (i = 0; i < EM_MAX_RETRY; i++) {
867 rc = ap->ops->transmit_led_message(ap,
868 emp->led_state,
869 4);
870 /*
871 * If busy, give a breather but do not
872 * release EH ownership by using msleep()
873 * instead of ata_msleep(). EM Transmit
874 * bit is busy for the whole host and
875 * releasing ownership will cause other
876 * ports to fail the same way.
877 */
878 if (rc == -EBUSY)
879 msleep(1);
880 else
881 break;
882 }
883 }
884 }
885
886 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
887 ata_for_each_link(link, ap, EDGE)
888 ahci_init_sw_activity(link);
889
890 }
891
ahci_deinit_port(struct ata_port * ap,const char ** emsg)892 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
893 {
894 int rc;
895 struct ahci_host_priv *hpriv = ap->host->private_data;
896
897 /* disable DMA */
898 rc = hpriv->stop_engine(ap);
899 if (rc) {
900 *emsg = "failed to stop engine";
901 return rc;
902 }
903
904 /* disable FIS reception */
905 rc = ahci_stop_fis_rx(ap);
906 if (rc) {
907 *emsg = "failed stop FIS RX";
908 return rc;
909 }
910
911 return 0;
912 }
913
ahci_reset_controller(struct ata_host * host)914 int ahci_reset_controller(struct ata_host *host)
915 {
916 struct ahci_host_priv *hpriv = host->private_data;
917 void __iomem *mmio = hpriv->mmio;
918 u32 tmp;
919
920 /* we must be in AHCI mode, before using anything
921 * AHCI-specific, such as HOST_RESET.
922 */
923 ahci_enable_ahci(mmio);
924
925 /* global controller reset */
926 if (!ahci_skip_host_reset) {
927 tmp = readl(mmio + HOST_CTL);
928 if ((tmp & HOST_RESET) == 0) {
929 writel(tmp | HOST_RESET, mmio + HOST_CTL);
930 readl(mmio + HOST_CTL); /* flush */
931 }
932
933 /*
934 * to perform host reset, OS should set HOST_RESET
935 * and poll until this bit is read to be "0".
936 * reset must complete within 1 second, or
937 * the hardware should be considered fried.
938 */
939 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
940 HOST_RESET, 10, 1000);
941
942 if (tmp & HOST_RESET) {
943 dev_err(host->dev, "controller reset failed (0x%x)\n",
944 tmp);
945 return -EIO;
946 }
947
948 /* turn on AHCI mode */
949 ahci_enable_ahci(mmio);
950
951 /* Some registers might be cleared on reset. Restore
952 * initial values.
953 */
954 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO))
955 ahci_restore_initial_config(host);
956 } else
957 dev_info(host->dev, "skipping global host reset\n");
958
959 return 0;
960 }
961 EXPORT_SYMBOL_GPL(ahci_reset_controller);
962
ahci_sw_activity(struct ata_link * link)963 static void ahci_sw_activity(struct ata_link *link)
964 {
965 struct ata_port *ap = link->ap;
966 struct ahci_port_priv *pp = ap->private_data;
967 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
968
969 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
970 return;
971
972 emp->activity++;
973 if (!timer_pending(&emp->timer))
974 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
975 }
976
ahci_sw_activity_blink(struct timer_list * t)977 static void ahci_sw_activity_blink(struct timer_list *t)
978 {
979 struct ahci_em_priv *emp = from_timer(emp, t, timer);
980 struct ata_link *link = emp->link;
981 struct ata_port *ap = link->ap;
982
983 unsigned long led_message = emp->led_state;
984 u32 activity_led_state;
985 unsigned long flags;
986
987 led_message &= EM_MSG_LED_VALUE;
988 led_message |= ap->port_no | (link->pmp << 8);
989
990 /* check to see if we've had activity. If so,
991 * toggle state of LED and reset timer. If not,
992 * turn LED to desired idle state.
993 */
994 spin_lock_irqsave(ap->lock, flags);
995 if (emp->saved_activity != emp->activity) {
996 emp->saved_activity = emp->activity;
997 /* get the current LED state */
998 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
999
1000 if (activity_led_state)
1001 activity_led_state = 0;
1002 else
1003 activity_led_state = 1;
1004
1005 /* clear old state */
1006 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1007
1008 /* toggle state */
1009 led_message |= (activity_led_state << 16);
1010 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1011 } else {
1012 /* switch to idle */
1013 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1014 if (emp->blink_policy == BLINK_OFF)
1015 led_message |= (1 << 16);
1016 }
1017 spin_unlock_irqrestore(ap->lock, flags);
1018 ap->ops->transmit_led_message(ap, led_message, 4);
1019 }
1020
ahci_init_sw_activity(struct ata_link * link)1021 static void ahci_init_sw_activity(struct ata_link *link)
1022 {
1023 struct ata_port *ap = link->ap;
1024 struct ahci_port_priv *pp = ap->private_data;
1025 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1026
1027 /* init activity stats, setup timer */
1028 emp->saved_activity = emp->activity = 0;
1029 emp->link = link;
1030 timer_setup(&emp->timer, ahci_sw_activity_blink, 0);
1031
1032 /* check our blink policy and set flag for link if it's enabled */
1033 if (emp->blink_policy)
1034 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1035 }
1036
ahci_reset_em(struct ata_host * host)1037 int ahci_reset_em(struct ata_host *host)
1038 {
1039 struct ahci_host_priv *hpriv = host->private_data;
1040 void __iomem *mmio = hpriv->mmio;
1041 u32 em_ctl;
1042
1043 em_ctl = readl(mmio + HOST_EM_CTL);
1044 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1045 return -EINVAL;
1046
1047 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1048 return 0;
1049 }
1050 EXPORT_SYMBOL_GPL(ahci_reset_em);
1051
ahci_transmit_led_message(struct ata_port * ap,u32 state,ssize_t size)1052 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1053 ssize_t size)
1054 {
1055 struct ahci_host_priv *hpriv = ap->host->private_data;
1056 struct ahci_port_priv *pp = ap->private_data;
1057 void __iomem *mmio = hpriv->mmio;
1058 u32 em_ctl;
1059 u32 message[] = {0, 0};
1060 unsigned long flags;
1061 int pmp;
1062 struct ahci_em_priv *emp;
1063
1064 /* get the slot number from the message */
1065 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1066 if (pmp < EM_MAX_SLOTS)
1067 emp = &pp->em_priv[pmp];
1068 else
1069 return -EINVAL;
1070
1071 ahci_rpm_get_port(ap);
1072 spin_lock_irqsave(ap->lock, flags);
1073
1074 /*
1075 * if we are still busy transmitting a previous message,
1076 * do not allow
1077 */
1078 em_ctl = readl(mmio + HOST_EM_CTL);
1079 if (em_ctl & EM_CTL_TM) {
1080 spin_unlock_irqrestore(ap->lock, flags);
1081 ahci_rpm_put_port(ap);
1082 return -EBUSY;
1083 }
1084
1085 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
1086 /*
1087 * create message header - this is all zero except for
1088 * the message size, which is 4 bytes.
1089 */
1090 message[0] |= (4 << 8);
1091
1092 /* ignore 0:4 of byte zero, fill in port info yourself */
1093 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1094
1095 /* write message to EM_LOC */
1096 writel(message[0], mmio + hpriv->em_loc);
1097 writel(message[1], mmio + hpriv->em_loc+4);
1098
1099 /*
1100 * tell hardware to transmit the message
1101 */
1102 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1103 }
1104
1105 /* save off new led state for port/slot */
1106 emp->led_state = state;
1107
1108 spin_unlock_irqrestore(ap->lock, flags);
1109 ahci_rpm_put_port(ap);
1110
1111 return size;
1112 }
1113
ahci_led_show(struct ata_port * ap,char * buf)1114 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1115 {
1116 struct ahci_port_priv *pp = ap->private_data;
1117 struct ata_link *link;
1118 struct ahci_em_priv *emp;
1119 int rc = 0;
1120
1121 ata_for_each_link(link, ap, EDGE) {
1122 emp = &pp->em_priv[link->pmp];
1123 rc += sprintf(buf, "%lx\n", emp->led_state);
1124 }
1125 return rc;
1126 }
1127
ahci_led_store(struct ata_port * ap,const char * buf,size_t size)1128 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1129 size_t size)
1130 {
1131 unsigned int state;
1132 int pmp;
1133 struct ahci_port_priv *pp = ap->private_data;
1134 struct ahci_em_priv *emp;
1135
1136 if (kstrtouint(buf, 0, &state) < 0)
1137 return -EINVAL;
1138
1139 /* get the slot number from the message */
1140 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1141 if (pmp < EM_MAX_SLOTS) {
1142 pmp = array_index_nospec(pmp, EM_MAX_SLOTS);
1143 emp = &pp->em_priv[pmp];
1144 } else {
1145 return -EINVAL;
1146 }
1147
1148 /* mask off the activity bits if we are in sw_activity
1149 * mode, user should turn off sw_activity before setting
1150 * activity led through em_message
1151 */
1152 if (emp->blink_policy)
1153 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1154
1155 return ap->ops->transmit_led_message(ap, state, size);
1156 }
1157
ahci_activity_store(struct ata_device * dev,enum sw_activity val)1158 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1159 {
1160 struct ata_link *link = dev->link;
1161 struct ata_port *ap = link->ap;
1162 struct ahci_port_priv *pp = ap->private_data;
1163 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1164 u32 port_led_state = emp->led_state;
1165
1166 /* save the desired Activity LED behavior */
1167 if (val == OFF) {
1168 /* clear LFLAG */
1169 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1170
1171 /* set the LED to OFF */
1172 port_led_state &= EM_MSG_LED_VALUE_OFF;
1173 port_led_state |= (ap->port_no | (link->pmp << 8));
1174 ap->ops->transmit_led_message(ap, port_led_state, 4);
1175 } else {
1176 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1177 if (val == BLINK_OFF) {
1178 /* set LED to ON for idle */
1179 port_led_state &= EM_MSG_LED_VALUE_OFF;
1180 port_led_state |= (ap->port_no | (link->pmp << 8));
1181 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1182 ap->ops->transmit_led_message(ap, port_led_state, 4);
1183 }
1184 }
1185 emp->blink_policy = val;
1186 return 0;
1187 }
1188
ahci_activity_show(struct ata_device * dev,char * buf)1189 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1190 {
1191 struct ata_link *link = dev->link;
1192 struct ata_port *ap = link->ap;
1193 struct ahci_port_priv *pp = ap->private_data;
1194 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1195
1196 /* display the saved value of activity behavior for this
1197 * disk.
1198 */
1199 return sprintf(buf, "%d\n", emp->blink_policy);
1200 }
1201
ahci_port_init(struct device * dev,struct ata_port * ap,int port_no,void __iomem * mmio,void __iomem * port_mmio)1202 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1203 int port_no, void __iomem *mmio,
1204 void __iomem *port_mmio)
1205 {
1206 struct ahci_host_priv *hpriv = ap->host->private_data;
1207 const char *emsg = NULL;
1208 int rc;
1209 u32 tmp;
1210
1211 /* make sure port is not active */
1212 rc = ahci_deinit_port(ap, &emsg);
1213 if (rc)
1214 dev_warn(dev, "%s (%d)\n", emsg, rc);
1215
1216 /* clear SError */
1217 tmp = readl(port_mmio + PORT_SCR_ERR);
1218 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1219 writel(tmp, port_mmio + PORT_SCR_ERR);
1220
1221 /* clear port IRQ */
1222 tmp = readl(port_mmio + PORT_IRQ_STAT);
1223 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1224 if (tmp)
1225 writel(tmp, port_mmio + PORT_IRQ_STAT);
1226
1227 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1228
1229 /* mark esata ports */
1230 tmp = readl(port_mmio + PORT_CMD);
1231 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
1232 ap->pflags |= ATA_PFLAG_EXTERNAL;
1233 }
1234
ahci_init_controller(struct ata_host * host)1235 void ahci_init_controller(struct ata_host *host)
1236 {
1237 struct ahci_host_priv *hpriv = host->private_data;
1238 void __iomem *mmio = hpriv->mmio;
1239 int i;
1240 void __iomem *port_mmio;
1241 u32 tmp;
1242
1243 for (i = 0; i < host->n_ports; i++) {
1244 struct ata_port *ap = host->ports[i];
1245
1246 port_mmio = ahci_port_base(ap);
1247 if (ata_port_is_dummy(ap))
1248 continue;
1249
1250 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1251 }
1252
1253 tmp = readl(mmio + HOST_CTL);
1254 VPRINTK("HOST_CTL 0x%x\n", tmp);
1255 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1256 tmp = readl(mmio + HOST_CTL);
1257 VPRINTK("HOST_CTL 0x%x\n", tmp);
1258 }
1259 EXPORT_SYMBOL_GPL(ahci_init_controller);
1260
ahci_dev_config(struct ata_device * dev)1261 static void ahci_dev_config(struct ata_device *dev)
1262 {
1263 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1264
1265 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1266 dev->max_sectors = 255;
1267 ata_dev_info(dev,
1268 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1269 }
1270 }
1271
ahci_dev_classify(struct ata_port * ap)1272 unsigned int ahci_dev_classify(struct ata_port *ap)
1273 {
1274 void __iomem *port_mmio = ahci_port_base(ap);
1275 struct ata_taskfile tf;
1276 u32 tmp;
1277
1278 tmp = readl(port_mmio + PORT_SIG);
1279 tf.lbah = (tmp >> 24) & 0xff;
1280 tf.lbam = (tmp >> 16) & 0xff;
1281 tf.lbal = (tmp >> 8) & 0xff;
1282 tf.nsect = (tmp) & 0xff;
1283
1284 return ata_dev_classify(&tf);
1285 }
1286 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1287
ahci_fill_cmd_slot(struct ahci_port_priv * pp,unsigned int tag,u32 opts)1288 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1289 u32 opts)
1290 {
1291 dma_addr_t cmd_tbl_dma;
1292
1293 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1294
1295 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1296 pp->cmd_slot[tag].status = 0;
1297 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1298 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1299 }
1300 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1301
ahci_kick_engine(struct ata_port * ap)1302 int ahci_kick_engine(struct ata_port *ap)
1303 {
1304 void __iomem *port_mmio = ahci_port_base(ap);
1305 struct ahci_host_priv *hpriv = ap->host->private_data;
1306 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1307 u32 tmp;
1308 int busy, rc;
1309
1310 /* stop engine */
1311 rc = hpriv->stop_engine(ap);
1312 if (rc)
1313 goto out_restart;
1314
1315 /* need to do CLO?
1316 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1317 */
1318 busy = status & (ATA_BUSY | ATA_DRQ);
1319 if (!busy && !sata_pmp_attached(ap)) {
1320 rc = 0;
1321 goto out_restart;
1322 }
1323
1324 if (!(hpriv->cap & HOST_CAP_CLO)) {
1325 rc = -EOPNOTSUPP;
1326 goto out_restart;
1327 }
1328
1329 /* perform CLO */
1330 tmp = readl(port_mmio + PORT_CMD);
1331 tmp |= PORT_CMD_CLO;
1332 writel(tmp, port_mmio + PORT_CMD);
1333
1334 rc = 0;
1335 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1336 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1337 if (tmp & PORT_CMD_CLO)
1338 rc = -EIO;
1339
1340 /* restart engine */
1341 out_restart:
1342 hpriv->start_engine(ap);
1343 return rc;
1344 }
1345 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1346
ahci_exec_polled_cmd(struct ata_port * ap,int pmp,struct ata_taskfile * tf,int is_cmd,u16 flags,unsigned long timeout_msec)1347 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1348 struct ata_taskfile *tf, int is_cmd, u16 flags,
1349 unsigned long timeout_msec)
1350 {
1351 const u32 cmd_fis_len = 5; /* five dwords */
1352 struct ahci_port_priv *pp = ap->private_data;
1353 void __iomem *port_mmio = ahci_port_base(ap);
1354 u8 *fis = pp->cmd_tbl;
1355 u32 tmp;
1356
1357 /* prep the command */
1358 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1359 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1360
1361 /* set port value for softreset of Port Multiplier */
1362 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) {
1363 tmp = readl(port_mmio + PORT_FBS);
1364 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1365 tmp |= pmp << PORT_FBS_DEV_OFFSET;
1366 writel(tmp, port_mmio + PORT_FBS);
1367 pp->fbs_last_dev = pmp;
1368 }
1369
1370 /* issue & wait */
1371 writel(1, port_mmio + PORT_CMD_ISSUE);
1372
1373 if (timeout_msec) {
1374 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1375 0x1, 0x1, 1, timeout_msec);
1376 if (tmp & 0x1) {
1377 ahci_kick_engine(ap);
1378 return -EBUSY;
1379 }
1380 } else
1381 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1382
1383 return 0;
1384 }
1385
ahci_do_softreset(struct ata_link * link,unsigned int * class,int pmp,unsigned long deadline,int (* check_ready)(struct ata_link * link))1386 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1387 int pmp, unsigned long deadline,
1388 int (*check_ready)(struct ata_link *link))
1389 {
1390 struct ata_port *ap = link->ap;
1391 struct ahci_host_priv *hpriv = ap->host->private_data;
1392 struct ahci_port_priv *pp = ap->private_data;
1393 const char *reason = NULL;
1394 unsigned long now, msecs;
1395 struct ata_taskfile tf;
1396 bool fbs_disabled = false;
1397 int rc;
1398
1399 DPRINTK("ENTER\n");
1400
1401 /* prepare for SRST (AHCI-1.1 10.4.1) */
1402 rc = ahci_kick_engine(ap);
1403 if (rc && rc != -EOPNOTSUPP)
1404 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1405
1406 /*
1407 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall
1408 * clear PxFBS.EN to '0' prior to issuing software reset to devices
1409 * that is attached to port multiplier.
1410 */
1411 if (!ata_is_host_link(link) && pp->fbs_enabled) {
1412 ahci_disable_fbs(ap);
1413 fbs_disabled = true;
1414 }
1415
1416 ata_tf_init(link->device, &tf);
1417
1418 /* issue the first H2D Register FIS */
1419 msecs = 0;
1420 now = jiffies;
1421 if (time_after(deadline, now))
1422 msecs = jiffies_to_msecs(deadline - now);
1423
1424 tf.ctl |= ATA_SRST;
1425 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1426 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1427 rc = -EIO;
1428 reason = "1st FIS failed";
1429 goto fail;
1430 }
1431
1432 /* spec says at least 5us, but be generous and sleep for 1ms */
1433 ata_msleep(ap, 1);
1434
1435 /* issue the second H2D Register FIS */
1436 tf.ctl &= ~ATA_SRST;
1437 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1438
1439 /* wait for link to become ready */
1440 rc = ata_wait_after_reset(link, deadline, check_ready);
1441 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1442 /*
1443 * Workaround for cases where link online status can't
1444 * be trusted. Treat device readiness timeout as link
1445 * offline.
1446 */
1447 ata_link_info(link, "device not ready, treating as offline\n");
1448 *class = ATA_DEV_NONE;
1449 } else if (rc) {
1450 /* link occupied, -ENODEV too is an error */
1451 reason = "device not ready";
1452 goto fail;
1453 } else
1454 *class = ahci_dev_classify(ap);
1455
1456 /* re-enable FBS if disabled before */
1457 if (fbs_disabled)
1458 ahci_enable_fbs(ap);
1459
1460 DPRINTK("EXIT, class=%u\n", *class);
1461 return 0;
1462
1463 fail:
1464 ata_link_err(link, "softreset failed (%s)\n", reason);
1465 return rc;
1466 }
1467
ahci_check_ready(struct ata_link * link)1468 int ahci_check_ready(struct ata_link *link)
1469 {
1470 void __iomem *port_mmio = ahci_port_base(link->ap);
1471 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1472
1473 return ata_check_ready(status);
1474 }
1475 EXPORT_SYMBOL_GPL(ahci_check_ready);
1476
ahci_softreset(struct ata_link * link,unsigned int * class,unsigned long deadline)1477 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1478 unsigned long deadline)
1479 {
1480 int pmp = sata_srst_pmp(link);
1481
1482 DPRINTK("ENTER\n");
1483
1484 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1485 }
1486 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1487
ahci_bad_pmp_check_ready(struct ata_link * link)1488 static int ahci_bad_pmp_check_ready(struct ata_link *link)
1489 {
1490 void __iomem *port_mmio = ahci_port_base(link->ap);
1491 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1492 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1493
1494 /*
1495 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1496 * which can save timeout delay.
1497 */
1498 if (irq_status & PORT_IRQ_BAD_PMP)
1499 return -EIO;
1500
1501 return ata_check_ready(status);
1502 }
1503
ahci_pmp_retry_softreset(struct ata_link * link,unsigned int * class,unsigned long deadline)1504 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1505 unsigned long deadline)
1506 {
1507 struct ata_port *ap = link->ap;
1508 void __iomem *port_mmio = ahci_port_base(ap);
1509 int pmp = sata_srst_pmp(link);
1510 int rc;
1511 u32 irq_sts;
1512
1513 DPRINTK("ENTER\n");
1514
1515 rc = ahci_do_softreset(link, class, pmp, deadline,
1516 ahci_bad_pmp_check_ready);
1517
1518 /*
1519 * Soft reset fails with IPMS set when PMP is enabled but
1520 * SATA HDD/ODD is connected to SATA port, do soft reset
1521 * again to port 0.
1522 */
1523 if (rc == -EIO) {
1524 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1525 if (irq_sts & PORT_IRQ_BAD_PMP) {
1526 ata_link_warn(link,
1527 "applying PMP SRST workaround "
1528 "and retrying\n");
1529 rc = ahci_do_softreset(link, class, 0, deadline,
1530 ahci_check_ready);
1531 }
1532 }
1533
1534 return rc;
1535 }
1536
ahci_do_hardreset(struct ata_link * link,unsigned int * class,unsigned long deadline,bool * online)1537 int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
1538 unsigned long deadline, bool *online)
1539 {
1540 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1541 struct ata_port *ap = link->ap;
1542 struct ahci_port_priv *pp = ap->private_data;
1543 struct ahci_host_priv *hpriv = ap->host->private_data;
1544 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1545 struct ata_taskfile tf;
1546 int rc;
1547
1548 DPRINTK("ENTER\n");
1549
1550 hpriv->stop_engine(ap);
1551
1552 /* clear D2H reception area to properly wait for D2H FIS */
1553 ata_tf_init(link->device, &tf);
1554 tf.command = ATA_BUSY;
1555 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1556
1557 rc = sata_link_hardreset(link, timing, deadline, online,
1558 ahci_check_ready);
1559
1560 hpriv->start_engine(ap);
1561
1562 if (*online)
1563 *class = ahci_dev_classify(ap);
1564
1565 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1566 return rc;
1567 }
1568 EXPORT_SYMBOL_GPL(ahci_do_hardreset);
1569
ahci_hardreset(struct ata_link * link,unsigned int * class,unsigned long deadline)1570 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1571 unsigned long deadline)
1572 {
1573 bool online;
1574
1575 return ahci_do_hardreset(link, class, deadline, &online);
1576 }
1577
ahci_postreset(struct ata_link * link,unsigned int * class)1578 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1579 {
1580 struct ata_port *ap = link->ap;
1581 void __iomem *port_mmio = ahci_port_base(ap);
1582 u32 new_tmp, tmp;
1583
1584 ata_std_postreset(link, class);
1585
1586 /* Make sure port's ATAPI bit is set appropriately */
1587 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1588 if (*class == ATA_DEV_ATAPI)
1589 new_tmp |= PORT_CMD_ATAPI;
1590 else
1591 new_tmp &= ~PORT_CMD_ATAPI;
1592 if (new_tmp != tmp) {
1593 writel(new_tmp, port_mmio + PORT_CMD);
1594 readl(port_mmio + PORT_CMD); /* flush */
1595 }
1596 }
1597
ahci_fill_sg(struct ata_queued_cmd * qc,void * cmd_tbl)1598 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1599 {
1600 struct scatterlist *sg;
1601 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1602 unsigned int si;
1603
1604 VPRINTK("ENTER\n");
1605
1606 /*
1607 * Next, the S/G list.
1608 */
1609 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1610 dma_addr_t addr = sg_dma_address(sg);
1611 u32 sg_len = sg_dma_len(sg);
1612
1613 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1614 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1615 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1616 }
1617
1618 return si;
1619 }
1620
ahci_pmp_qc_defer(struct ata_queued_cmd * qc)1621 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1622 {
1623 struct ata_port *ap = qc->ap;
1624 struct ahci_port_priv *pp = ap->private_data;
1625
1626 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1627 return ata_std_qc_defer(qc);
1628 else
1629 return sata_pmp_qc_defer_cmd_switch(qc);
1630 }
1631
ahci_qc_prep(struct ata_queued_cmd * qc)1632 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc)
1633 {
1634 struct ata_port *ap = qc->ap;
1635 struct ahci_port_priv *pp = ap->private_data;
1636 int is_atapi = ata_is_atapi(qc->tf.protocol);
1637 void *cmd_tbl;
1638 u32 opts;
1639 const u32 cmd_fis_len = 5; /* five dwords */
1640 unsigned int n_elem;
1641
1642 /*
1643 * Fill in command table information. First, the header,
1644 * a SATA Register - Host to Device command FIS.
1645 */
1646 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ;
1647
1648 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1649 if (is_atapi) {
1650 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1651 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1652 }
1653
1654 n_elem = 0;
1655 if (qc->flags & ATA_QCFLAG_DMAMAP)
1656 n_elem = ahci_fill_sg(qc, cmd_tbl);
1657
1658 /*
1659 * Fill in command slot information.
1660 */
1661 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1662 if (qc->tf.flags & ATA_TFLAG_WRITE)
1663 opts |= AHCI_CMD_WRITE;
1664 if (is_atapi)
1665 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1666
1667 ahci_fill_cmd_slot(pp, qc->hw_tag, opts);
1668
1669 return AC_ERR_OK;
1670 }
1671
ahci_fbs_dec_intr(struct ata_port * ap)1672 static void ahci_fbs_dec_intr(struct ata_port *ap)
1673 {
1674 struct ahci_port_priv *pp = ap->private_data;
1675 void __iomem *port_mmio = ahci_port_base(ap);
1676 u32 fbs = readl(port_mmio + PORT_FBS);
1677 int retries = 3;
1678
1679 DPRINTK("ENTER\n");
1680 BUG_ON(!pp->fbs_enabled);
1681
1682 /* time to wait for DEC is not specified by AHCI spec,
1683 * add a retry loop for safety.
1684 */
1685 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1686 fbs = readl(port_mmio + PORT_FBS);
1687 while ((fbs & PORT_FBS_DEC) && retries--) {
1688 udelay(1);
1689 fbs = readl(port_mmio + PORT_FBS);
1690 }
1691
1692 if (fbs & PORT_FBS_DEC)
1693 dev_err(ap->host->dev, "failed to clear device error\n");
1694 }
1695
ahci_error_intr(struct ata_port * ap,u32 irq_stat)1696 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1697 {
1698 struct ahci_host_priv *hpriv = ap->host->private_data;
1699 struct ahci_port_priv *pp = ap->private_data;
1700 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1701 struct ata_link *link = NULL;
1702 struct ata_queued_cmd *active_qc;
1703 struct ata_eh_info *active_ehi;
1704 bool fbs_need_dec = false;
1705 u32 serror;
1706
1707 /* determine active link with error */
1708 if (pp->fbs_enabled) {
1709 void __iomem *port_mmio = ahci_port_base(ap);
1710 u32 fbs = readl(port_mmio + PORT_FBS);
1711 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1712
1713 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1714 link = &ap->pmp_link[pmp];
1715 fbs_need_dec = true;
1716 }
1717
1718 } else
1719 ata_for_each_link(link, ap, EDGE)
1720 if (ata_link_active(link))
1721 break;
1722
1723 if (!link)
1724 link = &ap->link;
1725
1726 active_qc = ata_qc_from_tag(ap, link->active_tag);
1727 active_ehi = &link->eh_info;
1728
1729 /* record irq stat */
1730 ata_ehi_clear_desc(host_ehi);
1731 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1732
1733 /* AHCI needs SError cleared; otherwise, it might lock up */
1734 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1735 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1736 host_ehi->serror |= serror;
1737
1738 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1739 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1740 irq_stat &= ~PORT_IRQ_IF_ERR;
1741
1742 if (irq_stat & PORT_IRQ_TF_ERR) {
1743 /* If qc is active, charge it; otherwise, the active
1744 * link. There's no active qc on NCQ errors. It will
1745 * be determined by EH by reading log page 10h.
1746 */
1747 if (active_qc)
1748 active_qc->err_mask |= AC_ERR_DEV;
1749 else
1750 active_ehi->err_mask |= AC_ERR_DEV;
1751
1752 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1753 host_ehi->serror &= ~SERR_INTERNAL;
1754 }
1755
1756 if (irq_stat & PORT_IRQ_UNK_FIS) {
1757 u32 *unk = pp->rx_fis + RX_FIS_UNK;
1758
1759 active_ehi->err_mask |= AC_ERR_HSM;
1760 active_ehi->action |= ATA_EH_RESET;
1761 ata_ehi_push_desc(active_ehi,
1762 "unknown FIS %08x %08x %08x %08x" ,
1763 unk[0], unk[1], unk[2], unk[3]);
1764 }
1765
1766 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1767 active_ehi->err_mask |= AC_ERR_HSM;
1768 active_ehi->action |= ATA_EH_RESET;
1769 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1770 }
1771
1772 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1773 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1774 host_ehi->action |= ATA_EH_RESET;
1775 ata_ehi_push_desc(host_ehi, "host bus error");
1776 }
1777
1778 if (irq_stat & PORT_IRQ_IF_ERR) {
1779 if (fbs_need_dec)
1780 active_ehi->err_mask |= AC_ERR_DEV;
1781 else {
1782 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1783 host_ehi->action |= ATA_EH_RESET;
1784 }
1785
1786 ata_ehi_push_desc(host_ehi, "interface fatal error");
1787 }
1788
1789 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1790 ata_ehi_hotplugged(host_ehi);
1791 ata_ehi_push_desc(host_ehi, "%s",
1792 irq_stat & PORT_IRQ_CONNECT ?
1793 "connection status changed" : "PHY RDY changed");
1794 }
1795
1796 /* okay, let's hand over to EH */
1797
1798 if (irq_stat & PORT_IRQ_FREEZE)
1799 ata_port_freeze(ap);
1800 else if (fbs_need_dec) {
1801 ata_link_abort(link);
1802 ahci_fbs_dec_intr(ap);
1803 } else
1804 ata_port_abort(ap);
1805 }
1806
ahci_handle_port_interrupt(struct ata_port * ap,void __iomem * port_mmio,u32 status)1807 static void ahci_handle_port_interrupt(struct ata_port *ap,
1808 void __iomem *port_mmio, u32 status)
1809 {
1810 struct ata_eh_info *ehi = &ap->link.eh_info;
1811 struct ahci_port_priv *pp = ap->private_data;
1812 struct ahci_host_priv *hpriv = ap->host->private_data;
1813 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1814 u32 qc_active = 0;
1815 int rc;
1816
1817 /* ignore BAD_PMP while resetting */
1818 if (unlikely(resetting))
1819 status &= ~PORT_IRQ_BAD_PMP;
1820
1821 if (sata_lpm_ignore_phy_events(&ap->link)) {
1822 status &= ~PORT_IRQ_PHYRDY;
1823 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1824 }
1825
1826 if (unlikely(status & PORT_IRQ_ERROR)) {
1827 ahci_error_intr(ap, status);
1828 return;
1829 }
1830
1831 if (status & PORT_IRQ_SDB_FIS) {
1832 /* If SNotification is available, leave notification
1833 * handling to sata_async_notification(). If not,
1834 * emulate it by snooping SDB FIS RX area.
1835 *
1836 * Snooping FIS RX area is probably cheaper than
1837 * poking SNotification but some constrollers which
1838 * implement SNotification, ICH9 for example, don't
1839 * store AN SDB FIS into receive area.
1840 */
1841 if (hpriv->cap & HOST_CAP_SNTF)
1842 sata_async_notification(ap);
1843 else {
1844 /* If the 'N' bit in word 0 of the FIS is set,
1845 * we just received asynchronous notification.
1846 * Tell libata about it.
1847 *
1848 * Lack of SNotification should not appear in
1849 * ahci 1.2, so the workaround is unnecessary
1850 * when FBS is enabled.
1851 */
1852 if (pp->fbs_enabled)
1853 WARN_ON_ONCE(1);
1854 else {
1855 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1856 u32 f0 = le32_to_cpu(f[0]);
1857 if (f0 & (1 << 15))
1858 sata_async_notification(ap);
1859 }
1860 }
1861 }
1862
1863 /* pp->active_link is not reliable once FBS is enabled, both
1864 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1865 * NCQ and non-NCQ commands may be in flight at the same time.
1866 */
1867 if (pp->fbs_enabled) {
1868 if (ap->qc_active) {
1869 qc_active = readl(port_mmio + PORT_SCR_ACT);
1870 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1871 }
1872 } else {
1873 /* pp->active_link is valid iff any command is in flight */
1874 if (ap->qc_active && pp->active_link->sactive)
1875 qc_active = readl(port_mmio + PORT_SCR_ACT);
1876 else
1877 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1878 }
1879
1880
1881 rc = ata_qc_complete_multiple(ap, qc_active);
1882
1883 /* while resetting, invalid completions are expected */
1884 if (unlikely(rc < 0 && !resetting)) {
1885 ehi->err_mask |= AC_ERR_HSM;
1886 ehi->action |= ATA_EH_RESET;
1887 ata_port_freeze(ap);
1888 }
1889 }
1890
ahci_port_intr(struct ata_port * ap)1891 static void ahci_port_intr(struct ata_port *ap)
1892 {
1893 void __iomem *port_mmio = ahci_port_base(ap);
1894 u32 status;
1895
1896 status = readl(port_mmio + PORT_IRQ_STAT);
1897 writel(status, port_mmio + PORT_IRQ_STAT);
1898
1899 ahci_handle_port_interrupt(ap, port_mmio, status);
1900 }
1901
ahci_multi_irqs_intr_hard(int irq,void * dev_instance)1902 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance)
1903 {
1904 struct ata_port *ap = dev_instance;
1905 void __iomem *port_mmio = ahci_port_base(ap);
1906 u32 status;
1907
1908 VPRINTK("ENTER\n");
1909
1910 status = readl(port_mmio + PORT_IRQ_STAT);
1911 writel(status, port_mmio + PORT_IRQ_STAT);
1912
1913 spin_lock(ap->lock);
1914 ahci_handle_port_interrupt(ap, port_mmio, status);
1915 spin_unlock(ap->lock);
1916
1917 VPRINTK("EXIT\n");
1918
1919 return IRQ_HANDLED;
1920 }
1921
ahci_handle_port_intr(struct ata_host * host,u32 irq_masked)1922 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked)
1923 {
1924 unsigned int i, handled = 0;
1925
1926 for (i = 0; i < host->n_ports; i++) {
1927 struct ata_port *ap;
1928
1929 if (!(irq_masked & (1 << i)))
1930 continue;
1931
1932 ap = host->ports[i];
1933 if (ap) {
1934 ahci_port_intr(ap);
1935 VPRINTK("port %u\n", i);
1936 } else {
1937 VPRINTK("port %u (no irq)\n", i);
1938 if (ata_ratelimit())
1939 dev_warn(host->dev,
1940 "interrupt on disabled port %u\n", i);
1941 }
1942
1943 handled = 1;
1944 }
1945
1946 return handled;
1947 }
1948 EXPORT_SYMBOL_GPL(ahci_handle_port_intr);
1949
ahci_single_level_irq_intr(int irq,void * dev_instance)1950 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance)
1951 {
1952 struct ata_host *host = dev_instance;
1953 struct ahci_host_priv *hpriv;
1954 unsigned int rc = 0;
1955 void __iomem *mmio;
1956 u32 irq_stat, irq_masked;
1957
1958 VPRINTK("ENTER\n");
1959
1960 hpriv = host->private_data;
1961 mmio = hpriv->mmio;
1962
1963 /* sigh. 0xffffffff is a valid return from h/w */
1964 irq_stat = readl(mmio + HOST_IRQ_STAT);
1965 if (!irq_stat)
1966 return IRQ_NONE;
1967
1968 irq_masked = irq_stat & hpriv->port_map;
1969
1970 spin_lock(&host->lock);
1971
1972 rc = ahci_handle_port_intr(host, irq_masked);
1973
1974 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1975 * it should be cleared after all the port events are cleared;
1976 * otherwise, it will raise a spurious interrupt after each
1977 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1978 * information.
1979 *
1980 * Also, use the unmasked value to clear interrupt as spurious
1981 * pending event on a dummy port might cause screaming IRQ.
1982 */
1983 writel(irq_stat, mmio + HOST_IRQ_STAT);
1984
1985 spin_unlock(&host->lock);
1986
1987 VPRINTK("EXIT\n");
1988
1989 return IRQ_RETVAL(rc);
1990 }
1991
ahci_qc_issue(struct ata_queued_cmd * qc)1992 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1993 {
1994 struct ata_port *ap = qc->ap;
1995 void __iomem *port_mmio = ahci_port_base(ap);
1996 struct ahci_port_priv *pp = ap->private_data;
1997
1998 /* Keep track of the currently active link. It will be used
1999 * in completion path to determine whether NCQ phase is in
2000 * progress.
2001 */
2002 pp->active_link = qc->dev->link;
2003
2004 if (ata_is_ncq(qc->tf.protocol))
2005 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT);
2006
2007 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
2008 u32 fbs = readl(port_mmio + PORT_FBS);
2009 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
2010 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
2011 writel(fbs, port_mmio + PORT_FBS);
2012 pp->fbs_last_dev = qc->dev->link->pmp;
2013 }
2014
2015 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE);
2016
2017 ahci_sw_activity(qc->dev->link);
2018
2019 return 0;
2020 }
2021 EXPORT_SYMBOL_GPL(ahci_qc_issue);
2022
ahci_qc_fill_rtf(struct ata_queued_cmd * qc)2023 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
2024 {
2025 struct ahci_port_priv *pp = qc->ap->private_data;
2026 u8 *rx_fis = pp->rx_fis;
2027
2028 if (pp->fbs_enabled)
2029 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
2030
2031 /*
2032 * After a successful execution of an ATA PIO data-in command,
2033 * the device doesn't send D2H Reg FIS to update the TF and
2034 * the host should take TF and E_Status from the preceding PIO
2035 * Setup FIS.
2036 */
2037 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
2038 !(qc->flags & ATA_QCFLAG_FAILED)) {
2039 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
2040 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
2041 } else
2042 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
2043
2044 return true;
2045 }
2046
ahci_freeze(struct ata_port * ap)2047 static void ahci_freeze(struct ata_port *ap)
2048 {
2049 void __iomem *port_mmio = ahci_port_base(ap);
2050
2051 /* turn IRQ off */
2052 writel(0, port_mmio + PORT_IRQ_MASK);
2053 }
2054
ahci_thaw(struct ata_port * ap)2055 static void ahci_thaw(struct ata_port *ap)
2056 {
2057 struct ahci_host_priv *hpriv = ap->host->private_data;
2058 void __iomem *mmio = hpriv->mmio;
2059 void __iomem *port_mmio = ahci_port_base(ap);
2060 u32 tmp;
2061 struct ahci_port_priv *pp = ap->private_data;
2062
2063 /* clear IRQ */
2064 tmp = readl(port_mmio + PORT_IRQ_STAT);
2065 writel(tmp, port_mmio + PORT_IRQ_STAT);
2066 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2067
2068 /* turn IRQ back on */
2069 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2070 }
2071
ahci_error_handler(struct ata_port * ap)2072 void ahci_error_handler(struct ata_port *ap)
2073 {
2074 struct ahci_host_priv *hpriv = ap->host->private_data;
2075
2076 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2077 /* restart engine */
2078 hpriv->stop_engine(ap);
2079 hpriv->start_engine(ap);
2080 }
2081
2082 sata_pmp_error_handler(ap);
2083
2084 if (!ata_dev_enabled(ap->link.device))
2085 hpriv->stop_engine(ap);
2086 }
2087 EXPORT_SYMBOL_GPL(ahci_error_handler);
2088
ahci_post_internal_cmd(struct ata_queued_cmd * qc)2089 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2090 {
2091 struct ata_port *ap = qc->ap;
2092
2093 /* make DMA engine forget about the failed command */
2094 if (qc->flags & ATA_QCFLAG_FAILED)
2095 ahci_kick_engine(ap);
2096 }
2097
ahci_set_aggressive_devslp(struct ata_port * ap,bool sleep)2098 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2099 {
2100 struct ahci_host_priv *hpriv = ap->host->private_data;
2101 void __iomem *port_mmio = ahci_port_base(ap);
2102 struct ata_device *dev = ap->link.device;
2103 u32 devslp, dm, dito, mdat, deto, dito_conf;
2104 int rc;
2105 unsigned int err_mask;
2106
2107 devslp = readl(port_mmio + PORT_DEVSLP);
2108 if (!(devslp & PORT_DEVSLP_DSP)) {
2109 dev_info(ap->host->dev, "port does not support device sleep\n");
2110 return;
2111 }
2112
2113 /* disable device sleep */
2114 if (!sleep) {
2115 if (devslp & PORT_DEVSLP_ADSE) {
2116 writel(devslp & ~PORT_DEVSLP_ADSE,
2117 port_mmio + PORT_DEVSLP);
2118 err_mask = ata_dev_set_feature(dev,
2119 SETFEATURES_SATA_DISABLE,
2120 SATA_DEVSLP);
2121 if (err_mask && err_mask != AC_ERR_DEV)
2122 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2123 }
2124 return;
2125 }
2126
2127 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2128 dito = devslp_idle_timeout / (dm + 1);
2129 if (dito > 0x3ff)
2130 dito = 0x3ff;
2131
2132 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF;
2133
2134 /* device sleep was already enabled and same dito */
2135 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito))
2136 return;
2137
2138 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2139 rc = hpriv->stop_engine(ap);
2140 if (rc)
2141 return;
2142
2143 /* Use the nominal value 10 ms if the read MDAT is zero,
2144 * the nominal value of DETO is 20 ms.
2145 */
2146 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2147 ATA_LOG_DEVSLP_VALID_MASK) {
2148 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2149 ATA_LOG_DEVSLP_MDAT_MASK;
2150 if (!mdat)
2151 mdat = 10;
2152 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
2153 if (!deto)
2154 deto = 20;
2155 } else {
2156 mdat = 10;
2157 deto = 20;
2158 }
2159
2160 /* Make dito, mdat, deto bits to 0s */
2161 devslp &= ~GENMASK_ULL(24, 2);
2162 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
2163 (mdat << PORT_DEVSLP_MDAT_OFFSET) |
2164 (deto << PORT_DEVSLP_DETO_OFFSET) |
2165 PORT_DEVSLP_ADSE);
2166 writel(devslp, port_mmio + PORT_DEVSLP);
2167
2168 hpriv->start_engine(ap);
2169
2170 /* enable device sleep feature for the drive */
2171 err_mask = ata_dev_set_feature(dev,
2172 SETFEATURES_SATA_ENABLE,
2173 SATA_DEVSLP);
2174 if (err_mask && err_mask != AC_ERR_DEV)
2175 ata_dev_warn(dev, "failed to enable DEVSLP\n");
2176 }
2177
ahci_enable_fbs(struct ata_port * ap)2178 static void ahci_enable_fbs(struct ata_port *ap)
2179 {
2180 struct ahci_host_priv *hpriv = ap->host->private_data;
2181 struct ahci_port_priv *pp = ap->private_data;
2182 void __iomem *port_mmio = ahci_port_base(ap);
2183 u32 fbs;
2184 int rc;
2185
2186 if (!pp->fbs_supported)
2187 return;
2188
2189 fbs = readl(port_mmio + PORT_FBS);
2190 if (fbs & PORT_FBS_EN) {
2191 pp->fbs_enabled = true;
2192 pp->fbs_last_dev = -1; /* initialization */
2193 return;
2194 }
2195
2196 rc = hpriv->stop_engine(ap);
2197 if (rc)
2198 return;
2199
2200 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
2201 fbs = readl(port_mmio + PORT_FBS);
2202 if (fbs & PORT_FBS_EN) {
2203 dev_info(ap->host->dev, "FBS is enabled\n");
2204 pp->fbs_enabled = true;
2205 pp->fbs_last_dev = -1; /* initialization */
2206 } else
2207 dev_err(ap->host->dev, "Failed to enable FBS\n");
2208
2209 hpriv->start_engine(ap);
2210 }
2211
ahci_disable_fbs(struct ata_port * ap)2212 static void ahci_disable_fbs(struct ata_port *ap)
2213 {
2214 struct ahci_host_priv *hpriv = ap->host->private_data;
2215 struct ahci_port_priv *pp = ap->private_data;
2216 void __iomem *port_mmio = ahci_port_base(ap);
2217 u32 fbs;
2218 int rc;
2219
2220 if (!pp->fbs_supported)
2221 return;
2222
2223 fbs = readl(port_mmio + PORT_FBS);
2224 if ((fbs & PORT_FBS_EN) == 0) {
2225 pp->fbs_enabled = false;
2226 return;
2227 }
2228
2229 rc = hpriv->stop_engine(ap);
2230 if (rc)
2231 return;
2232
2233 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
2234 fbs = readl(port_mmio + PORT_FBS);
2235 if (fbs & PORT_FBS_EN)
2236 dev_err(ap->host->dev, "Failed to disable FBS\n");
2237 else {
2238 dev_info(ap->host->dev, "FBS is disabled\n");
2239 pp->fbs_enabled = false;
2240 }
2241
2242 hpriv->start_engine(ap);
2243 }
2244
ahci_pmp_attach(struct ata_port * ap)2245 static void ahci_pmp_attach(struct ata_port *ap)
2246 {
2247 void __iomem *port_mmio = ahci_port_base(ap);
2248 struct ahci_port_priv *pp = ap->private_data;
2249 u32 cmd;
2250
2251 cmd = readl(port_mmio + PORT_CMD);
2252 cmd |= PORT_CMD_PMP;
2253 writel(cmd, port_mmio + PORT_CMD);
2254
2255 ahci_enable_fbs(ap);
2256
2257 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2258
2259 /*
2260 * We must not change the port interrupt mask register if the
2261 * port is marked frozen, the value in pp->intr_mask will be
2262 * restored later when the port is thawed.
2263 *
2264 * Note that during initialization, the port is marked as
2265 * frozen since the irq handler is not yet registered.
2266 */
2267 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2268 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2269 }
2270
ahci_pmp_detach(struct ata_port * ap)2271 static void ahci_pmp_detach(struct ata_port *ap)
2272 {
2273 void __iomem *port_mmio = ahci_port_base(ap);
2274 struct ahci_port_priv *pp = ap->private_data;
2275 u32 cmd;
2276
2277 ahci_disable_fbs(ap);
2278
2279 cmd = readl(port_mmio + PORT_CMD);
2280 cmd &= ~PORT_CMD_PMP;
2281 writel(cmd, port_mmio + PORT_CMD);
2282
2283 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2284
2285 /* see comment above in ahci_pmp_attach() */
2286 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2287 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2288 }
2289
ahci_port_resume(struct ata_port * ap)2290 int ahci_port_resume(struct ata_port *ap)
2291 {
2292 ahci_rpm_get_port(ap);
2293
2294 ahci_power_up(ap);
2295 ahci_start_port(ap);
2296
2297 if (sata_pmp_attached(ap))
2298 ahci_pmp_attach(ap);
2299 else
2300 ahci_pmp_detach(ap);
2301
2302 return 0;
2303 }
2304 EXPORT_SYMBOL_GPL(ahci_port_resume);
2305
2306 #ifdef CONFIG_PM
ahci_port_suspend(struct ata_port * ap,pm_message_t mesg)2307 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2308 {
2309 const char *emsg = NULL;
2310 int rc;
2311
2312 rc = ahci_deinit_port(ap, &emsg);
2313 if (rc == 0)
2314 ahci_power_down(ap);
2315 else {
2316 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2317 ata_port_freeze(ap);
2318 }
2319
2320 ahci_rpm_put_port(ap);
2321 return rc;
2322 }
2323 #endif
2324
ahci_port_start(struct ata_port * ap)2325 static int ahci_port_start(struct ata_port *ap)
2326 {
2327 struct ahci_host_priv *hpriv = ap->host->private_data;
2328 struct device *dev = ap->host->dev;
2329 struct ahci_port_priv *pp;
2330 void *mem;
2331 dma_addr_t mem_dma;
2332 size_t dma_sz, rx_fis_sz;
2333
2334 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2335 if (!pp)
2336 return -ENOMEM;
2337
2338 if (ap->host->n_ports > 1) {
2339 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2340 if (!pp->irq_desc) {
2341 devm_kfree(dev, pp);
2342 return -ENOMEM;
2343 }
2344 snprintf(pp->irq_desc, 8,
2345 "%s%d", dev_driver_string(dev), ap->port_no);
2346 }
2347
2348 /* check FBS capability */
2349 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2350 void __iomem *port_mmio = ahci_port_base(ap);
2351 u32 cmd = readl(port_mmio + PORT_CMD);
2352 if (cmd & PORT_CMD_FBSCP)
2353 pp->fbs_supported = true;
2354 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2355 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2356 ap->port_no);
2357 pp->fbs_supported = true;
2358 } else
2359 dev_warn(dev, "port %d is not capable of FBS\n",
2360 ap->port_no);
2361 }
2362
2363 if (pp->fbs_supported) {
2364 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2365 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2366 } else {
2367 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2368 rx_fis_sz = AHCI_RX_FIS_SZ;
2369 }
2370
2371 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2372 if (!mem)
2373 return -ENOMEM;
2374
2375 /*
2376 * First item in chunk of DMA memory: 32-slot command table,
2377 * 32 bytes each in size
2378 */
2379 pp->cmd_slot = mem;
2380 pp->cmd_slot_dma = mem_dma;
2381
2382 mem += AHCI_CMD_SLOT_SZ;
2383 mem_dma += AHCI_CMD_SLOT_SZ;
2384
2385 /*
2386 * Second item: Received-FIS area
2387 */
2388 pp->rx_fis = mem;
2389 pp->rx_fis_dma = mem_dma;
2390
2391 mem += rx_fis_sz;
2392 mem_dma += rx_fis_sz;
2393
2394 /*
2395 * Third item: data area for storing a single command
2396 * and its scatter-gather table
2397 */
2398 pp->cmd_tbl = mem;
2399 pp->cmd_tbl_dma = mem_dma;
2400
2401 /*
2402 * Save off initial list of interrupts to be enabled.
2403 * This could be changed later
2404 */
2405 pp->intr_mask = DEF_PORT_IRQ;
2406
2407 /*
2408 * Switch to per-port locking in case each port has its own MSI vector.
2409 */
2410 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2411 spin_lock_init(&pp->lock);
2412 ap->lock = &pp->lock;
2413 }
2414
2415 ap->private_data = pp;
2416
2417 /* engage engines, captain */
2418 return ahci_port_resume(ap);
2419 }
2420
ahci_port_stop(struct ata_port * ap)2421 static void ahci_port_stop(struct ata_port *ap)
2422 {
2423 const char *emsg = NULL;
2424 struct ahci_host_priv *hpriv = ap->host->private_data;
2425 void __iomem *host_mmio = hpriv->mmio;
2426 int rc;
2427
2428 /* de-initialize port */
2429 rc = ahci_deinit_port(ap, &emsg);
2430 if (rc)
2431 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2432
2433 /*
2434 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
2435 * re-enabling INTx.
2436 */
2437 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
2438
2439 ahci_rpm_put_port(ap);
2440 }
2441
ahci_print_info(struct ata_host * host,const char * scc_s)2442 void ahci_print_info(struct ata_host *host, const char *scc_s)
2443 {
2444 struct ahci_host_priv *hpriv = host->private_data;
2445 u32 vers, cap, cap2, impl, speed;
2446 const char *speed_s;
2447
2448 vers = hpriv->version;
2449 cap = hpriv->cap;
2450 cap2 = hpriv->cap2;
2451 impl = hpriv->port_map;
2452
2453 speed = (cap >> 20) & 0xf;
2454 if (speed == 1)
2455 speed_s = "1.5";
2456 else if (speed == 2)
2457 speed_s = "3";
2458 else if (speed == 3)
2459 speed_s = "6";
2460 else
2461 speed_s = "?";
2462
2463 dev_info(host->dev,
2464 "AHCI %02x%02x.%02x%02x "
2465 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2466 ,
2467
2468 (vers >> 24) & 0xff,
2469 (vers >> 16) & 0xff,
2470 (vers >> 8) & 0xff,
2471 vers & 0xff,
2472
2473 ((cap >> 8) & 0x1f) + 1,
2474 (cap & 0x1f) + 1,
2475 speed_s,
2476 impl,
2477 scc_s);
2478
2479 dev_info(host->dev,
2480 "flags: "
2481 "%s%s%s%s%s%s%s"
2482 "%s%s%s%s%s%s%s"
2483 "%s%s%s%s%s%s%s"
2484 "%s%s\n"
2485 ,
2486
2487 cap & HOST_CAP_64 ? "64bit " : "",
2488 cap & HOST_CAP_NCQ ? "ncq " : "",
2489 cap & HOST_CAP_SNTF ? "sntf " : "",
2490 cap & HOST_CAP_MPS ? "ilck " : "",
2491 cap & HOST_CAP_SSS ? "stag " : "",
2492 cap & HOST_CAP_ALPM ? "pm " : "",
2493 cap & HOST_CAP_LED ? "led " : "",
2494 cap & HOST_CAP_CLO ? "clo " : "",
2495 cap & HOST_CAP_ONLY ? "only " : "",
2496 cap & HOST_CAP_PMP ? "pmp " : "",
2497 cap & HOST_CAP_FBS ? "fbs " : "",
2498 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2499 cap & HOST_CAP_SSC ? "slum " : "",
2500 cap & HOST_CAP_PART ? "part " : "",
2501 cap & HOST_CAP_CCC ? "ccc " : "",
2502 cap & HOST_CAP_EMS ? "ems " : "",
2503 cap & HOST_CAP_SXS ? "sxs " : "",
2504 cap2 & HOST_CAP2_DESO ? "deso " : "",
2505 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2506 cap2 & HOST_CAP2_SDS ? "sds " : "",
2507 cap2 & HOST_CAP2_APST ? "apst " : "",
2508 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2509 cap2 & HOST_CAP2_BOH ? "boh " : ""
2510 );
2511 }
2512 EXPORT_SYMBOL_GPL(ahci_print_info);
2513
ahci_set_em_messages(struct ahci_host_priv * hpriv,struct ata_port_info * pi)2514 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2515 struct ata_port_info *pi)
2516 {
2517 u8 messages;
2518 void __iomem *mmio = hpriv->mmio;
2519 u32 em_loc = readl(mmio + HOST_EM_LOC);
2520 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2521
2522 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2523 return;
2524
2525 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2526
2527 if (messages) {
2528 /* store em_loc */
2529 hpriv->em_loc = ((em_loc >> 16) * 4);
2530 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2531 hpriv->em_msg_type = messages;
2532 pi->flags |= ATA_FLAG_EM;
2533 if (!(em_ctl & EM_CTL_ALHD))
2534 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2535 }
2536 }
2537 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2538
ahci_host_activate_multi_irqs(struct ata_host * host,struct scsi_host_template * sht)2539 static int ahci_host_activate_multi_irqs(struct ata_host *host,
2540 struct scsi_host_template *sht)
2541 {
2542 struct ahci_host_priv *hpriv = host->private_data;
2543 int i, rc;
2544
2545 rc = ata_host_start(host);
2546 if (rc)
2547 return rc;
2548 /*
2549 * Requests IRQs according to AHCI-1.1 when multiple MSIs were
2550 * allocated. That is one MSI per port, starting from @irq.
2551 */
2552 for (i = 0; i < host->n_ports; i++) {
2553 struct ahci_port_priv *pp = host->ports[i]->private_data;
2554 int irq = hpriv->get_irq_vector(host, i);
2555
2556 /* Do not receive interrupts sent by dummy ports */
2557 if (!pp) {
2558 disable_irq(irq);
2559 continue;
2560 }
2561
2562 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard,
2563 0, pp->irq_desc, host->ports[i]);
2564
2565 if (rc)
2566 return rc;
2567 ata_port_desc(host->ports[i], "irq %d", irq);
2568 }
2569
2570 return ata_host_register(host, sht);
2571 }
2572
2573 /**
2574 * ahci_host_activate - start AHCI host, request IRQs and register it
2575 * @host: target ATA host
2576 * @sht: scsi_host_template to use when registering the host
2577 *
2578 * LOCKING:
2579 * Inherited from calling layer (may sleep).
2580 *
2581 * RETURNS:
2582 * 0 on success, -errno otherwise.
2583 */
ahci_host_activate(struct ata_host * host,struct scsi_host_template * sht)2584 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht)
2585 {
2586 struct ahci_host_priv *hpriv = host->private_data;
2587 int irq = hpriv->irq;
2588 int rc;
2589
2590 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2591 if (hpriv->irq_handler &&
2592 hpriv->irq_handler != ahci_single_level_irq_intr)
2593 dev_warn(host->dev,
2594 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n");
2595 if (!hpriv->get_irq_vector) {
2596 dev_err(host->dev,
2597 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n");
2598 return -EIO;
2599 }
2600
2601 rc = ahci_host_activate_multi_irqs(host, sht);
2602 } else {
2603 rc = ata_host_activate(host, irq, hpriv->irq_handler,
2604 IRQF_SHARED, sht);
2605 }
2606
2607
2608 return rc;
2609 }
2610 EXPORT_SYMBOL_GPL(ahci_host_activate);
2611
2612 MODULE_AUTHOR("Jeff Garzik");
2613 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2614 MODULE_LICENSE("GPL");
2615